Internet is full of login/password protected sites. Every user in the world has dozens or even hundreds of logins stored somewhere (Password manager, browser, text file). But sometimes we forgot how to get into specific portal even if we have that login / password pair. Sites change their design, their domains, sites disappear and reappear again. Google tries its best to find all these sites, but sometimes it cant.
Signin Vault is small community-driven site to discover and store sites and all possible login pages. We constantly scan internet for new login forms and also accept submissions via contact us page. We try our best so our users can find sites which otherwise not discoverable though other tools